Q. Which microscopic, single-celled photosynthetic organisms serve as the primary producers forming the base of the marine food chain?
✅ Correct Answer: (A)
Phytoplankton
Explanation: Phytoplankton are microscopic, autotrophic organisms floating in upper ocean layers. Through photosynthesis, they fix carbon dioxide into organic matter, forming the foundational base of aquatic trophic webs.
Explanation by: Mr. Dubey
Phytoplankton are microscopic, autotrophic organisms floating in upper ocean layers. Through photosynthesis, they fix carbon dioxide into organic matter, forming the foundational base of aquatic trophic webs.